Open your Word document
Place the cursor where you want the signature
Go to the Insert tab
Select Pictures if you have a scanned signature image
Choose the signature file from your device
Resize and position the signature as needed
Or go to Insert
Select Signature Line
Choose Microsoft Office Signature Line
Fill in the required signer details
Click OK
If using a digital signature, right-click the signature line
Select Sign
Add your name or select your certificate
Save the document
If needed, protect the document after signing